Event: Durham City Club Championship

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Opponent	Rating	Result
Thomas Finn	0	1 - 0
Ken P Neat	0	0 - 1
Marco Balocco	0	1 - 0
Fedir Dyshliuk	0	0 - 1
Philip Brooks	0	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

-80 = (0 + 400 * (2 - 3)) / 5)